one of the big changes is all the stove pipes are down, intelligence is red teamed, the fbi now has a national security branch, staffed by 10,000 people. i mean how could it be that people were learning how to fly planes and not land. these were the kinds of things they would look out for. and as bob mueller said in open session to us, we've had 20 attempts at the last year and every one of them has been stopped. i think that's good news. so we have learned. we have a counterterrorism center that specializes now in threats to the homeland. we have a director of national intelligence to provide coordination over the 16 different intelligence agencies. no longer are they their own spheres, they're part of a network. there have been changes and we have learned hard lessons. >> how important is the killing yesterday in yemen of the second in command al qaeda's second in command, al shirry. >> that hasn't been confirmed to the best of my knowledge. i don't know whether he is dead or not. but if he is, it's certain lay positive thing. over half of the al qaeda leadership has been taken out.